Sand-pulverizing machine.



G. W. HERB. SAND PULVERIZING MACHINE. APPLICATION FILED JUNE 22, 1907. 9 1,409, Patented June 14, 1910.

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SAND-PULVERIZING MACHINE.

Application filed June 22, 1907.

To all whom it may concern:

Be it known that I, CHARLES V. HERB, a f citizen of the United States, residing at Columbus, in the county of Franklin and State of Ohio, have invented a certain new and useful Improvement in SandPulverizing Machines, of which the following is a specification.

The objeot of this invention is more espe cially to provide a cheap, simplified and efficient construction of machine for reducing sand and small particles of stone to a pulverulent state for use in the manufacture of brick, artificial stone, cement, &c.

The invention is embodied in the construction herein set forth and particularly pointed out in the appended claims.

In the accompanying drawings illustrating an embodiment of the invention-Figure 1 is a top plan view; Fig. 2 is a vertical sectional view on the line c0w Fig. 1, with parts in full showing one hammer raised and the other dropped; Fig. 3 is a sectional view taken longitudinally of the anvil or trough alone on the line g y Fig. 1, and also showing a fraction of one of the weights; Fig. 4 is a rear view of the weight.

In the views 1 and 1 designate the side members of a suitable frame.

2 designates a shaft shown to be hexagonal in cross section but having cylindrical stud journals at its ends, said journals being located to turn in suitable bearings 2 and 2 on the rear of the frame members 1 and 1. The shaft 2 has secured on it a series of cams 3 arranged to have their operative points successively sixty degrees apart or spirally around the shaft. 1 designates another shaft stationarily secured between the frame members 1 and l parallel to but forward of the shaft 2. Secured loosely on the shaft 4 is a series of levers 5 having their rear ends extended to be acted on by the points of the cams 3 and their forward ends provided with rounded up-turned portions, as seen at 5 Fig. 2.

6 designates the pulverizing weight, hammer or stamp which is preferably of very hard metal. There is a series of these hammers and each of them is made at its rear side near its upper end with a cavity of L- form into which the rounded hook-like forward end of the lever 5 projects to engage Specification of Letters Patent.

the upper wall of the cavity. The lower end Patented June 14, 1910.

Serial No. 380.217.

1 of the pulverizing weight is inclined as seen in Figs. 3 and 4C.

7 designates the trough the bottom of which constitutes a bed or anvil over which flows the sand being pulverized. To form the bed or anvil the trough has its bottom of a heavy block of. wood sheathed with a heavy plate of hard metal, and this is inclined from the feed end at 7 to the discharging end at 7*. The lower ends of the pulverizing weights and the bed or anvil are correspondingly inclined.

8 designates a large gear fixed on the shaft 2 that is engaged by a pinion 9 connected with a driven pulley 10. The pinion 9 and pulley 10 can be mounted loosely on the stationary shaft 4, suitable collars 11 and 11 being provided to hold them in place.

In operation the sand or material to be pulverized is fed into the trough at 7 and subjected to the blows of the hammers or stamps. The weights are elevated by levers, which latter are successively operated by the cams and they drop by gravity. The sand being crushed and agitated by the blows of the weights gradually flows down the inclined trough where it discharges in a thoroughly pulverulent state. The fineness of the product is determined by the number of weights or stamps employed, which number can be varied to suit the requirements. I promote the feeding of the sand through the trough from hammer to hammer by arranging the cams on the shaft so that the second hammer is partially raised when the first drops, thus leaving a free space under the second hammer for the passage into it of the sand expelled from under the falling first hammer.

A hood, as indicated at 12 Fig. 2, extending over and lengthwise the trough, can be employed to prevent the escape of dust.

This hood can be provided with suitable openings for the passage and movement of the levers.

Because of the rounded forward end of the lever it moves with great freedom under its bearing in the weight, and as a consequence, the weight will drop and strike in a substantially vertical position, which position is most effective.

The forms of the parts can be varied without departing from the gist of the invention. The operative points of the cams can be made dual or plural so that with an equal speed of rotation of the cam shaft the blows of the hammers are multipled.

WVhat I claim and desire to secure by Letters Patent is:

1. In a sand pulverizing machine, the combination of a shaft having a series of spirally arranged cams fixed thereon, a corresponding series of independently movable levers operative by said cams, a corresponding series of vertically movable hammers or stamps having their sides in close proximity to each other and engaged by said levers, and a straight inclined anvil on which said hammers operate to pulverize the sand, the said hammers having their lower ends inclined correspondingly to the anvil, and the said cams being arranged and adapted successively to lift and release said hammers or stamps through said levers the lifting operation of each stamp or hammer between the end ones of the series being prior to the impact on the anvil of the one first operated next to it, whereby the flow of the pulverized material along the anvil is promoted.

2. In a pulverizing machine, the combination of a shaft having cams fixed thereon, a second shaft supporting independently-movable levers operative by said cams, said levers having rounded ends, hammers or stamps provided with recesses into which the rounded ends of the levers project to directly engage the hammers, and a trough in which said hammers operate to pulverize the material to be treated.

CHARLES W. HERB.

WVitnesses BENJAMIN FINoKnL, CI-IAs. H. THOMAS. 

